No abstract available.
Humans ; Mentors*

No abstract available.
Humans ; Mentors*

No abstract available.
Humans ; Mentors*

No abstract available.
Humans ; Mentors*

No abstract available.
Humans ; Mentors*

STATEMENT OF PROBLEM: Resonance frequency analysis is evaluated as the non-invasive and objective method for the evaluation of implant stability and has been increasingly used. It is necessary to evaluate the factors affect the ISQ measurement stability. PURPOSE: This study was performed to evaluate the effect of the autoclave sterilization and reuse of Smartpeg(TM) on ISQ measurement. MATERIAL AND METHODs: SmartPeg(TM) (Integration Diagnostics Ltd., Goteborg, Sweden) of autoclave group (A) was autoclave sterilized 9 times and Smartpeg(TM) of reuse group (R) was reused 9 times. Ten SmartPeg(TM)s were allocated to each group and after each autoclave sterilization and reuse, implant stability quotient (ISQ) values were measured 3 times from the two directions a and b at a right angle. Osstell(TM) mentor (Integration Diagnostics Ltd., Goteborg, Sweden) was used and type 1 (article no. 100353) Smartpeg(TM) was selected according to SmartpegTM reference list. Osstem Implant US II fixture (Osstem Co., Seoul, Korea) in 4.0 mm x 11.5 mm was embedded in the self-curing acrylic resin (Orthojet(R), Lang Dental, U.S.A.). Data was statistically analyzed by one-way ANOVA (alpha= .05) and scheffe test was done where a significant difference exist. Correlation test was also done between ISQ value and the number of autoclave sterilization or reuse. RESULTS: 1. In autoclave group, the means and sd. of ISQ value before autoclave sterilization were 84.97 +/-0.41, 84.93+/-0.74 at direction a and b. There was significant differences between autoclave groups at direction a and b (P=.000). 2. In reuse group, the means and sd. of ISQ value before reuse were 85.40+/-0.62, 85.50+/-0.57 at direction a and b. There was no significant difference between reuse groups at direction a and b (P>.05). 3. There was a weak positive correlation between the number of reuse and ISQ value at direction a and b (gamma=.207 and .246, P<.01). CONCLUSION: Within the limitations of this study, the following CONCLUSIONs were drawn. Till ninth reuse of Smartpeg(TM), the ISQ measurement stability did not be affected. After twice autoclave sterilization of Smartpeg(TM), the ISQ measurement stability was affected.
Humans ; Mentors ; Seoul ; Sterilization*

STATEMENT OF PROBLEM: How the ISQ values measured by Osstell(TM) and Osstell(TM) Mentor are related, and whether the ISQ values acquired from the two machines changes in accordance with changes in implant stability are not yet fully understood. PURPOSE: The aim of this study was to find out correlation between the ISQ values acquired from Osstell(TM) and Osstell(TM) Mentor, and to evaluate the clinical effectiveness and accuracy of two devices. MATERIAL AND METHODS: Sixty two implants were inserted into 47 patients, and their ISQ values were measured using Osstell(TM) and Osstell(TM) Mentor. In the first stage surgery, the ISQ values of forty four implants inserted into thirty five patients were measured. In the second stage surgery, the values of fifty implants inserted into thirty seven patients were measured. The values were analyzed to determine the difference between the mean ISQ values of Osstell(TM) and Osstell(TM) Mentor. In addition, the correlation between implants used in the first and second stage of surgery with regard to their types and areas of insertion were analyzed. The difference between the ISQ values of 32 implants in each patient during the first and second stage was analyzed. The statistical assessment was carried out using SPSS V. 12.0 for Win. (SPSS Inc., Chicago, USA). The Pearson correlation coefficient was used to examine the correlation between Osstell(TM) and Osstell(TM) Mentor in the first and second stages of surgery, whereas the difference between their ISQ values was evaluated using a paired t-test. RESULTS: In the first stage, the mean ISQ value for Osstell(TM) and Osstell(TM) Mentor was 70.84 and 75.09, respectively, showing a significant difference (P < .01). In the second stage, the mean ISQ value of Osstell(TM) and Osstell(TM) Mentor was 71.76 and 75.94, respectively, also showing a significant difference (P < .01). The difference between the ISQ values in patients in the first and the second stages was significant with both instruments. CONCLUSION: The significant difference in the values obtained using the Osstell(TM) and Osstell(TM) Mentor between the first and second stages of implant surgery indicates that these values can be a convenient and precise way for evaluating the implant stability in clinical practice.
Chicago ; Humans ; Mentors

PURPOSE: The present study was conducted to identify the correlation between control grade and stereoacuity in basic intermittent exotropia (X[T]). METHODS: Eighty-six patients with basic X (T) were divided into 3 subgroups according to their control grade and the near and distant stereoacuities were evaluated. RESULTS: Group 1; good control group, consisted of 28 patients, group 2; fair control, 30 patients, and group 3; poor control, 28 patients. Mean near stereoacuities measured by the Titmus test were 58.21 arcseconds in group 1, 75.33 arcseconds in group 2, and 151.43 arcseconds in group 3. The mean distant stereoacuities measured by a Mentor B-VAT(R) II-SG videoacuity tester were 118.93 arcseconds in group 1, 165.33 arcseconds in group 2, and 276.43 arcseconds in group 3. When comparing the 3 groups, the poorer the control grade, the worse were the near and distant stereoacuities (p = 0.002, p < 0.001). When compared in pairs, however, group 1 showed a better near stereoacuity than groups 2 and 3 (p = 0.02, p = 0.002, respectively), while group 2 and group 3 did not show any distinct differences (p = 0.13). Group 1 also showed a better distant stereoacuity than groups 2 and 3 (p = 0.02, p < 0.001, respectively), as did group 2 compared to group 3 (p < 0.001). CONCLUSIONS: Control grade and distant stereoacuity have significant correlation in patients with basic X (T) and can function as helpful indicators for monitoring the deterioration and progression of exodeviation.
Exotropia ; Humans ; Mentors

No abstract available.
Humans ; Memory* ; Mentors*

PURPOSE: The purpose of this study is to ascertain the stability of the implant by comparing the effects of the change of implant diameter, length and design on implant stability quotient. MATERIALS AND METHODS: To remove the variable due to the difference of bone quality, the uniform density (0.48 g/cm3) Polyuretane foam blocks (Sawbones(R), Pacific Research Laboratories Inc, Vashon, Washington) were used. Implants (Implantium(R), Dentium, Seoul, Korea) were placed with varying diameters (phi3.8, phi4.3 and phi4.8) and length (8 mm, 10 mm and 12 mm), to assess the effect on implant stability index (ISQ). Also the influence of the design of the submerged and the non-submerged (SimplelineII(R), Dentium, Seoul, Korea) on ISQ was evaluated. To exclude the influence of insertion torque, a total of 60 implants (n = 10) were placed with same torque to 35 N. Using Osstell(TM) mentor (Integration Diagnostic AB, Sweden) ISQ values were recorded after measuring the resonant frequency, one-way ANOVA and Tukey HSD test results were analyzed. (alpha=0.05). RESULTS: 1. The change of the diameter of the implant did not affect the ISQ (P>.05), but the increase of implant length increased the ISQ(P<.001). 2. The change in implant design were correlated with the ISQ, and the ISQ of submerged design was significantly higher than that of the non-submerged design(P<.05). CONCLUSION: In order to increase implant stability, the longer implant is better to be selected, and on the same length of implant, submerged design is thought to be able to get a higher ISQ than the non-submerged.
Humans ; Mentors ; Torque